LONDON 2017: McPherson, Jackson in heated altercation before 4x400

Don Quarrie, the Jamaican technical leader at the 2017 IAAF World Championship in London, says there was a rift between two members of the women's 4x400-metre relay squad just before the running of the final on Sunday.

Quarrie, speaking on TVJ, said he had to intervene to prevent a confrontation between Shericka Jackson and Stephenie Ann McPherson, two members of the MVP Track Club.

The technical leader further explained that after he intervened, one of the athletes said she would not run with her team member.

Quarrie said shortly he was advised that McPherson, who was down to run in the final, had pulled out of the team because of injury.

As a result of the unavailability of McPherson, Quarrie said Anneisha McLaughlin-Whilby was brought into the team.

McLaughlin-Whilby, on the second leg, pulled up with an injury shortly after receiving the baton from Chrisann Gordon and Jamaica failed to finish the race to end the World Championships on a disappointing end.

It marks the second straight day that Jamaica failed to finish a relay.

On Saturday, Usain Bolt's illustrious athletics career finished on a painful and shocking note as the iconic sprinter pulled up with an injury as Great Britain claimed a shock gold in the men's 4x100m relay.

Allyson Felix and Phyllis Francis won their second gold medals at the championships by helping the United States won the gold medal.

The favored Americans, with 400 champion Francis running the anchor, won in 3 minutes, 19.02 seconds. They finished about 50 metres ahead of silver medalist Britain. Poland took bronze.

Felix also won gold in the 4x100 relay on Saturday. The latest medal was the 16th of her career at the world championships, going back to 2005.

The relay gold also pushed the United States' overall total in London to 29 medals, another American record at the world championships.

Jamaica finished in joint 16th place with the Netherlands on the medal table with four medals, comprising one gold and three bronze.

Omar McLeod won the only gold medal for Jamaica in men's 110-metre hurdles on Monday.

The bronze medals came from Usain Bolt (100 metres) on August 5, Ristananna Tracey (400-metre hurdles) on August 10 and the women's 4x100-metre relay team on August 12.